Scatterbrained scientist Wayne Szalinski (Rick Moranis) develops a contraption that makes objects bigger. A routine test goes horribly wrong, however, when Wayne accidentally targets his 2-year-old son with the enlarging ray. The toddler experiences huge growth spurts every time he is exposed to electricity. When their child grows to become over 100 feet tall, Wayne and his wife, Diane (Marcia Strassman), must use a shrink ray to cure his gigantism before he destroys all of Las Vegas.
